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When you live in Chester County, Pennsylvania, you know exactly how cold it gets during the winter and how unbearable the heat can be during the summer. It is very important to have a reliable company that you can depend on for all your repair services. At Donnelly Heating & Air Conditioning, we recognize the importance of having an HVAC unit which works year round and provide service 365 days a year. If your unit is presenting problems or not working properly, call today at (610) 399-1998 to find out more information!
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Owning a property comes with many advantages and additional responsibilities. At times you'll experience concerns and problems with your Heating and Air Conditioning Systems. At Donnelly Heating & Air Conditioning, we recognize the importance of feeling comfortable indoors and provide professional HVAC services throughout the year in the Chester County area.
If your HVAC equipment is constantly breaking down or presenting a variety of issues, you may want to think about having it services. In many cases we may be able to repair your air conditioner or heating unit to avoid the cost of complete replacement. Our technicians at Donnelly Heating & Air Conditioning may be able to make your unit more efficient to save you on energy costs.
If your furnace and/or heat pump is extremely old or keeps breaking down, our repair team may advise you regarding the services that are needed to fix it up. You can trust our West Chester heating and air conditioning technicians here at Donnelly Heating & Air Conditioning to take care of the repair, maintenance, or installation process.
ENERGY STAR Systems incorporate eco-comfort technology, dual and triple-allergen filtration, and whisper-quiet operation. We have 15 new Energy Star rated systems with dramatic increases all the way up to 26 SEER and we have nine new systems that qualify for a federal tax credit of up to $300. Our units incorporate eco-comfort technology, dual and triple-allergen filtration, and are whisper-quiet.
Reviews (10)
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Bruce Bittenbender
May 16, 2022
We switched to Donnelly Heating & Air Conditioning Inc because we needed a new Heat Pump System installed. After receiving several proposals from both large and smaller local companies we selected Donnelly. Tom came out for a presale review of our system. He was professional, on time, knowledgeable, asked the right questions so he could prepare a proposal that met our needs and situation.

No high pressure, no upselling, using his experience to recommend the correct Heat Pump System at a reasonable price. He addressed all concerns and questions we had with the correct solutions. The installation crew was on time, very professional, knowledgeable, and experienced. The correct installation is as important as the system you select. Otherwise, you could have issues down the road or not happy with the installation.

They were on time, professional, explained all they did and how to get the most efficiency from our new system, took the time to explain the system and were careful to keep everything clean and neat. We also installed a Fresh Air Anti-Virus/Mold/Odor and Dust Ozone Free Purifier which other companies didn't even offer. You will be very happy if you need a small repair or an entire new heating and cooling system. We highly recommend Donnelly Heating & Air Conditioning for all your heating and cooling needs.
T. A.
Jan 30, 2022
Great diagnosis and execution. They even provided space heaters so we were warm while equipment was ordered and installed. A+ Service: Heating system installation
Melissa Slonaker
Oct 30, 2021
I had a great experience with this company. Everyone that I spoke with and interacted with were very friendly and helpful. When the work was being doing in my house all of the men were incredibly professional and respectful of my home. They cleaned up after themselves and explained the system to me before leaving. Services: Heating system installation, Install AC
Keith Anderson
Jul 03, 2021
Called Donnelly for an estimate to replace our HVAC system due to our AC going out in the middle of a heatwave. Tom (the owner) came out and provided a quote and charged our AC free of charge due to us having a bedridden senior in the house. Toms quote was the best of 4 that we had and we greatly appreciated his efforts in helping us with no obligation, it said a lot about him as a person and how he operates his business.

He had his team out as promised and did a great job replacing our system. We have our all of our maintenance done by Donnelly and have been very satisfied for over 8 years now. His guys are professional, respectful and nice to deal with. We highly recommend Donnelly!
Mark Hildebrand
Jan 03, 2021
Great price and quality of work. Had 3 estimates for new HVAC system. Donnelly HVAC was the lowest cost by far. Tom the owner explained everything when I got the estimate. He did not give a hard sell and was very easy to work with. He responded quickly to my emails and phone calls. Installation was done on date as scheduled and finished on time in one day. Highly recommend this company.
Martina Martin
Oct 18, 2020
My sister had an issue with her heating the first weekend it was cold. With no heat and kids in the house, we had to get it fixed asap. We called Donnelly and they had us scheduled for that afternoon. Lou came out and was very professional. He wore all the appropriate safety gear, went down to take a look at the heater, and even explained what was going on to my niece.

He fixed the heater and even recommended some items we might want to consider without being pushy or salesy. We really appreciate their professionalism and everything has been working great ever since. Would highly recommend!
Michael Merritt
May 27, 2020
We interviewed 4 HVAC companies and Donnelly Heating & Air Conditioning was by far the most professional. Tom Donnelly is very friendly and very easy to speak with. He answered all our questions in terms that the average consumer could easily understand. Donnelly's prices were also the best, but our decision had as much to do with the good feelings we had about the company.

Our friends referred us to Donnelly as they and other family members used them in the past. Installation went smoothly, their very clean and the installers (ask for Lou) are friendly and knowledgeable. I would strongly suggest calling them if you have any interest in a new heater or air conditioner. The time spent will be well worth it.
Ann Marie Harriger
Feb 26, 2020
We had a new HVAC unit put in by Donnelly heating and air recently. It was a fantastic experience from start to finish. The techs were on time and professional, as well as quick! We have worked with other larger companies in the past, but never again. Nothing beats working with a family run business. They truly care about their customers. Thank you so much to Tom and his techs!
Steven Lampert
Dec 22, 2019
We have been clients of Donnelly for over 20 years. Their technicians are top notch professionals. Recently they installed new AC, heater and hot water heater in our home. The service was excellent and the total cost was very reasonable. We highly recommend Donnelly to all our friends and neighbors who need heating and AC services.
Rosalind Edwards
Jun 21, 2019
I am very pleased with Donnelly Heating. I contacted them 3 yrs ago for a broken oil heater but couldn't afford the replacement heater at the time. I contacted them again and 3yrs later was still treated as a valued customer. Mr Donnelly remembered me which highly impressed me. He and his staff are professional, friendly and courteous. The installer is very knowledgeable. I'm happy with my new Gas heater conversion. I would highly recommend Donnelly Heating.